Verb, getting messed up. The action of being agitated in such a way as to lose control of one's rational/orderly/composed state of mind or being. Having one's mind blown. The word has sexual overtones, analogous to the word "screw".

Turn down the TV, it's tchouking loud!

He's tchouking my mind with all his conspiracy theories!

He lost his job, his wife left him, and he's being sued for 2 million dollars -- he's really tchouked.